Circularly-moving-hook sewing-machine.



P. DIEHL s. vA. 63166; CIYHIIULMLYl MOVING HOOK SEWING MACHINE.

(Applimiomen Apr. 6. 19oo.)

(No Model.)v

Mm .www

4'Patented nec. Il, |960.

3 Sheets-Sheet l. -V

No. 663,696. l Patented nec. |900.

r P. n-:HL 6 A. emes.

CIHCULARLY MVINGHOK SEWING NAGHINE.

' (Application led Apr, 9, 1.900.)Y No Model.) 3 Sheets-Sheet' 2.

ZJ HHHHHHIHHHHI I ri WITNESSES: l ll l TORS'. g, d i

P. DIEHL & A. `(RIEB.

' No. 663,696. Patented nec. n, |960;

CIRCULARLY MOVING HOOK SEWING MACHINE.

(Anplicat'ion filed Apr. 9. 1900.)

3 Sheets-Sheet 3.

| j till-1% III ""lII I. VEN Q UNITED STATES PHILIP DIEHL AN D ALFRED GRIEB, OF ELIZABETH, NEW JERSEY, ASSIGNORS TO THE SINGER MANUFACTURING COMPANY, OF NEW' JERSEY CIRCULARLY-NIOVING-HOOK SEWING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 663,696, dated December 11, 1900.

Application filed April 9, 1900.

To f/,Z/ fly/mm, ift 11m/y cori/cern:

Be it known that we, PHILIP DIEHL and ALFRED GRIEB, citizens of the United States, residingat Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a specifi cation, reference being had therein to the accom panying drawings.

This invention relates to that class of lock stitch sewing-machines in which the loops of needle-thread are carried by a circularly-moving, oscillating, or rotating hook around a stationary thread v case supported by said hook, so that said thread-case does not have to be lifled bythe loops of needlethread in passing beneath it, thus allowing the needlethread to pass around `the thread-case with the lea-slpossible friction or drag on said needle-thread. In the present case the loop-tak ing hook is disposed horizontally, so as to movecircularly in a horizontal plane, and is preferably given an oscillating movement, the loopseizing beak or hook proper being formed on the inner face of the hook ring or segment by which the thread-case is supported and said thread-case being preferably eccentric to and, in fact, mainly to one side of the line of the axis of movement of the hook, so that the loops of needle-thread are carried around the thread-caso to discharging position by a comparatively short circular movement of the hook.

In the accompanying drawings, Figure lis a sectional side view of a machine embodying the invention, and Fig. 2 is a bottom view thereof. Fig. 3 is a cross-section of the lower part of the machine on line 3 3, Fig. 2, looking in the direction of the arrow adjacent to said line. Fig. 4 is a detail plan view showin n` the circularly-moving hook, the threadcase, and the holder for maintaining` the latter stationary. Fig. 5 is a detail plan view of the hook with the thread-case omitted and the holder removed from its supporting-bracket. Fig. 6 is a detail plan view of the thread-case.

Fig. 7 is a cross-section of the thread-case and" also of the bobbin, this view showing also the thread-case holder partly in elevation and partly in section on line 7 7, Fig. l0. Fig. 8

is a detail view to show the operative relation serial No. 12,215. (No model.)

of the thread-case and hook, the latter being in cross-section; and Fig. 9 is a similar View,

`but showing also the hookshaft-supporting bracket as seen looking from the right of Fig. 4, with the hook-ring in section on line 9 9 and the bracket in section on line l0 l0, Fig. Ll, this view showing also the thread-case holder in elevation. Fig. l0 is a detail plan view of lhe threadcase holder, and Fig. ll is a detail bottom view of the thread-case.

Referringto the drawings,a denotesthe arm of the machine; IJ, the bed-plate; c, the horizontal driving-shaft, journaled in the upper portion of said arm and provided near its rear end with a crank d and having at its forward end a crank e, connected hya pilmanfw'ith the needle-bar g, carrying the usual eye-pointed needle h, said crank e being also connected in a well-known manner with the link take-up t'. The crank d is embraced by a fork at the upper end of a vertical rock-shaftj, having at its lower end an arm k, connected by a pitman Z to an arm 'm of a rocking hub n, provided with a grooved cam o aud having a second arm p, joined by a link q to an arm r of the rocking hook-shaft s.

The feed-bar i', is reciprocated horizontally, as is common in a wellknown style of Singer7 feeding mechanism, by a rocking feed-shaft u, having at ils rear end an arm o,

to which is jointed the lower end of a feed connection or link l, operated from a cam or eccentric w on the driving-shaft c. The vertical movements of the feed-harare imparted thereto `from the grooved cam o in the rocking hub or sleeve a, journaled on the fixed pin or stud 0a, the groove of said cam being' entered by a roller-stud y on a lever e, pivoted at 2 to the bracket 3, depending from the work-plate and forked or slotted at its free end'to embrace a roller-stud 4:, with which the feed bar t is provided. This feeding mechanism is, however, not herein claimed, the same being embraced by ourapplication, Serial No. 25,608, filed August 2, 1900.

The hook-shaft s carries at its upper end the horizontally-disposed circularly-rnoving hook or hook-ring 5, connect-ed with said shaft by one or more webs or spokes 6, said hookring having an inwardly-extending rib or flange 7, on the inner face of which is formed IOO the loop-seizing beak or hook proper, 8, outside ofwhich is a throat 9, in which theloops of needle thread are carried around the thread-case l0, havingaperipheral groove 1l, entered by thesaid rib or flange 7, to enable the said thread-case to be entirely supported by-the said hook-ring or hook owing to the rib-and -groove connection of these parts. The thread-case is preferably furnished with a bobbin 12 to contain the lower or locking thread but it is obvious that acop of thread might be usedinstead of the bobbin, if desired. v

The thread-case 10 is preferably arranged eccentric to and, in fact, so as to have its th read-chamber or bobbin-chamber mainly to one side of the a-Xis of movement of the vcircularly-moving hook.l The eccentrically-arranged thread-case is on that side of the axis of the hook toward which the loops of needlethread are first carried by the beak of the hook in spreading the loops of needle-th read around the'thread-case, or, in other words, the said thread-case is eccentric to the axis of the hook toward that side ofthe circular path ofthe hook first traversed by the beak of the hook after said beak has taken a loop of needle-thread from the needle. This eccentric arrangement of the thread-case relative to the hook-ring or hook by which it is supported permits of an early cast-offv in the movements of the hook of the loops of needlethread over the thread-case, so that shorter circular movements of the hook than have Vcase is not in contact with the said holder eX- cepting at or near the opposite ends or horns of the latter and against one or the other of which parts the said thread-case will at times restli gh tly. These points of contactbetween the holder and thread-case are respectively near the loop-dividing portion 14 and the loopdischarging or heel portion 15 of the said thread-case,.the last-named pointof contact of the holder and thread-case being preferably afforded by a small pin 16, having a rounded end for contact with the thread-case, the said pin being yieldingly mounted by reason of a small spring 17, which presses lightly against its opposite end, so that the said oontact-pin may yield a little, if necessary, to allow the needleloops to pass easily. The yielding contact afforded by the said springpressed pin 16 also serves to lessen or deaden any noise which might be occasioned by cont-act of the parts in the operation of the machine, or, in other words, the said yielding contact serves as a muffler.

The oscillating movemen ts of the loop taker or hook 5 may b e and preferably are so timed that when a loop of needle-thread is passing over the cast-off or loop-discharging portion of the thread-case the hook will have commenced its reverse movement, so that the light frictional contact. between the hook and thread-case will tend to open a free threadpassage between the heel portion of said case and the contact-pin 16, and when the first' limb of the loop is passing the loop-dividing portion of the thread-case the'forward movement of the hook at that time will have a tendency to open a free thread-passage between the said loop-dividing portion of said thread-case and the contactportion of the holder adjacent thereto, and thus the loops of needle-thread will be carried around the thread-case with the least possible friction or strain on said needle-thread.

The holder 18 is preferably provided with a needle-guard 18 to guide the vertically-reciprocating needle h and keep it out of the way of the advancing beak 8 of the horizontally-movi ng hook, and the said holder is also preferably ,provided with a loop guard .19, which extends cut over the flange 7 of the hook-ring adjacent to the loopt-discharging portion of the thread-case and which serves to prevent the loopsbf needle-thread from catching on the said holder. Asecond loopguard afforded by the arm 20, attached to the holder, serves to steady the loops of needlethread after they have been carried around the thread-case and prevent them from flopping or kinking when being drawn up by the take-up andas they are passing between the thread-case 10 and the holder. The threadcase holder 13 is also preferably provided with a small bobbin-ejecting lever 2l, one arm of which extends beneath the bobbin resting on an annular lip or ange at the bottom of the bobbin-chamber ofthe thread-case and the otheror u pper arm of which is constructed and arranged to afford a finger-piece to be pressed upon by the attendant to lift the bobbin from its seat in the thread-case, thus facilitating the removal of the said bobbin from said case. The bobbin-ejecting lever 21 is pivoted on the screw 22 and is held in its normal or inoperative position (shown in Fig. 7) by a small coil-spring 23, interposed between said lever and the portion 24 ofthe said holder.

In the operation of the machine the vertically-reciprocating needle h descends within the circularly-moving loop-taker or hook-ring 5, and as the needle rises and throws out its loopthe latter is caught by the beak 8 and is carried in the throat 9 of the hook against the loop-dividing portion 14: of the thread-case 10. As the hook now continues its forward movement with the needle-thread held in the said throat 9 of the said hook one limb of the loop passes freely around beneath the thread-case IOO IOS

IIO

supported on the iiange or rib 7 of the hook and clear of the web or Websconnecti ng the hook ring or segment with the hook-shaft s and the other limb of the said loop passes freely over the top of the thread-case. The bight of the loop of needle-thread carried in the throat 9 of the hook passes freely around the periphery of the thread-case and after having been carried to the cast-oit portion of said case can in 'being tightened by the takeup be readily drawn through between the thread-case and its holder, as hereinbefore described, and thus the loops of needle-th read are carried entirely around the thread-case with a minimum of friction on said thread. For this reason the lightest and finest needlethreads may be used with machines running at the highest speeds with little or no danger of breakage of the thread.

This improved machine, in which the eccentrically-arranged th read-case is supported by the circnlarly-moving horizontally-disposed loop taker or hook, presents very great advantages over machines in the prior art in which the thread-cases were not supported by the hooks and had therefore to be lifted by the thread each time a loop of needle-thread was passed around the thread-cases, as in-machines of the kind just referred to the friction on the needle-thread in passing around the thread-cases was so great that high speeds were impossible Without endangering breakfige of the needle-thread. This improved machine, with its eccentricallyarranged threadcase supported by the hook, also possesses great advantages over machines known to the prior art in which the thread-cases were supported by the hooks, but were not so arranged, as is the thread-case of the present machine, as to secure an early discharge of the loops of needle-thread about the threadcases, for the reason that the present invention obviates the necessity of the differential or irregular movements or double rotations of the hooks heretofore employed in order to secure sufficient time in the rotation of the drivingshaft for a proper operation of the feed and take-up.

1t Will be understood that the invention is not limited to the details herein shown and described or to a circularly moving hook which oscillates, as such hook might have a continuons rotary movement, or to a circularly-moving loop-taker which is a complete ring, as the loop-seizing beak might be formed on a segment, the invention being capable of being varied widely in its details without departing from the essential features thereof.

We do not herein claim the combination, with a stationary thread-.case supported by a loop-taking hook and arranged eccentric to the axis of the latter on that side of said axis toward which the loops of needle-thread are first carried by said hook in spreading said loops over said thread-case, of the particular needle-and-hook operating mechanism herein shown and described, this feature of our invention being reserved to and embraced by our application, Serial No. 33,211,

tiled October 16, 1900, and which is a division posed needle arranged to descend' inside of the circular path ot' movement of Said looptaker,and means for operating-said needle and loop-taker. ,y

2. In a sewing-machine, the combination with a curved, circularlymoving and horizontally-disposed loop-taker provided with an interior loop-seizing beak or hook, of a threadcase peripherally supported by said looptaker, a holder for restraining said case from moving with said loop-taker, said holder having one or more yielding contact parts to be engaged by said thread-case, a vertically-disposed needle arranged to descend inside of the circular path of movement of said looptaker, and means for operating said needle and loop-taker.

3. In a sewing-machine, the combination with a curved, circularly-niovingand horizontally-disposed loop-taker provided with an interior rib or flange having a loop-seizing beak or hook, of a thread-case peripherally supported by said loop-taker by a rib-and-groove connection, a holder for restraining said case from moving with said loop-taker, a vertically-disposed needle arranged to descend inside of the circular path of movement of said loop taker, and means for operating said needle and loop-taker.

4. In a sewing-machine, the combination with a curved, circularly-moving and horizontally-disposed loop-taker provided with an interior rib or liange having an inwardly-pointing loop-seizing beak or hook, of a thread-case located eccentric to the axis of and peripherally supported by said loop-taker, a holder for restraining said case from moving with said loop-taker, a vertically-disposed needle arranged to descend inside of the circular path of movement. of said loop-taker and means for operating said needle and loop-taker.

5. In a sewing-machine, the combination With a cu rved, ci rcularly-moving and horizontally-disposed loop-taker provided Wi th an interior rib or [iange having an inwardly-pointing loop-seizing beak or hook, of athread-case located eccentric to the axis of and peripherally supported by said loop-taker by a riband-groove connection, a holder for restraining said case from moving with said looptaker, a vertically-disposed needle arranged to descend inside of the circular path of movement of said loop-taker, and means for operating said needle and loop-taker.

IOO

IIO

6. In a sewing-machine, the combination with a vertically-reciprocating needle and its operating mechanism, of a ci rcularly-moving loop-taker provided with an interior loopseizing beak or hook, a thread-case located eccentric to the axis of the said loop-taker and peripherally supported by said loop-taker on thatI side of the axis of the latter toward which the loops of needle-thread are first carried 'by said beak, means for imparting circular movements t0 said loop-taker, and a holder for restraining the said case from moving with said hook as the latter travels about said case.

7. In a` sewing-machine the combination With a vertically-reciprocating needle and its operating mechanism, of a circularly-'moving loop-taker provided with an interior loopseizing beak or hook, a thread-case located eccentric to the axis of the said loop-taker and peripherally supported thereby by a rib-andgroove connection, means for operating said loop-taker, and a holder for restraining the said case from moving` with said hook the latter travels about said case.

8. In a sewing-machine, the combination with a vertically-reciprocating needle and its operating mechanism, of-a horizontally-disposed hook-ring provided with an interior loop-seizing beak or hook, and having a loopcarrying throat outside of said beak or hook,

' a thread-case peripherally supported by said hook-ring, means for imparting a circular movement to said hook-ring, and a holder for restraining the said case from movingwith said hook-ring as the latter travels about said case.

9. In a sewing-machine, the combination with a vertically-recprocating needle and its operating mechanism, of a horizontally-disposed hook-ring provided With an interior loop-seizing beak or hook and havinga loopcarrying throat outside of said beak or hook, a' thread-case peripherally supported by said hook-ring, by a rib-and-groove connection, means for imparting circular movements to said hook-ring, and a holder for restraining the said case from moving with said hookring as the latter travels about said case.

lO. In a sewing-machine, the combination with -a vertically-reciprocating needle and its operating mechanism, of a circ ularly-moving hook-ring provided with an interior .loopseizing beak or hook, a thread-case located eccentric to the axis of movement of said hook-ring and peripherally supported therei by, means for operatingsaid hook-ring, and a holder for restraining the said case from moving with said hook as the latter travels about said case.

ll. In a sewing-machine, the combination with a vertically-reciprocating needle and its operating mechanism, of acircularly-moving hook-ring` provided with an interior loopseizing beak or hook, a thread-case located eccentric to the axis of movement-of said hook-ring and peripherally supported thereby by a rib-and-groove connection which is less than half a circle in extent, means for operating said hook-ringL and a holder for restraining the said case from moving with said hook as the latter travels about said case.

l2. In a sewing-machine, the combination with a vertically reciprocating needle and its operating mechanism, of a horizontallyplaced, ci rcularly-moving hook provided With an interior loop-seizing beak, said needle descending within the circular path of movement of said hook, a thread-case Within and supported by said hook, means for operating said hook, and a holder, also located within said hook and serving to restrain the said case from moving with said hook as the latter travels about said case.

13. Inia sewing-machine, the combination With a vertically-reciprocating needle and its operating mechanism, of a horizontallyplaced,circularly-moving hook provided With an interior loop-seizing beak, said needle descending Within the circular path of movement of said hook, a thread-case within and supported by said hook by a rib-and-groove connection, and a holder, also located within said hook and serving to restrain the said case from moving Within said hook as the latter travels about said case.

14. In a sewing-machine, the combination with a vertically-reciprocating needle and its operating mechanism, of a horizontallydisposed, circularly-moving loop-taker provided With a beak or hook, means for operating said. loop-taker, a thread-case Within said loop-taker and provided With a bobbin, and a stationary threadcase holder provided with a bobbiu-lifting lever or ejector extending horizontally beneath the bobbin of said thread-case.

In testimony whereof We affix our signatures in the presence of two Witnesses.

PHILIP DIEI-IL. ALFRED GRIE'B.

` Witnesses; l

HENRY J. MILLER, W. IRVING HoUGH'IoN.

IOO 

